[Gdal-dev] Parzen Window Kernel Density Filter

[Markus Neteler]

On Sat, Jan 28, 2006 at 03:41:31AM -0500, Bill Binko wrote:
> Hi everyone,
> 
> So, I've looked at the various solutions for kernel density mapping, and 
> I think I know the approach I'd like to take.  I'd appreciate some 
> feedback and a sanity check before I write any code.
> 
> I've found several references that describe the Parzen Window Kernel 
> Density method, with the simplest being this 1D version:
> 
> http://en.wikipedia.org/wiki/Parzen_window
> 
> I've considered using R (or GRASS) to generate a raster image of my vector 
> point data.  Both have methods to do this (I believe the GRASS code 
> actually uses R though).  However, my point data covers the entire state 
> of florida, so to have any resolution of value, the result of this method 
> would be massive.

There is v.kernel in GRASS 6:
 http://grass.itc.it/grass61/manuals/html61_user/v.kernel.html

"Generates a raster density map from vector points data using a moving 2D isotropic Gaussian kernel or optionally generates a vector density map on vector network with a 1D kernel"

Markus